<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
<table border="1">
    <tr>
        <td>1</td>
        <td>1</td>
        <td>1</td>
    </tr>
    <tr>
        <td>1</td>
        <td rowspan="2">1</td>
        <td>1</td>
    </tr>
    <tr>
        <td>1</td>
        <td>1</td>
    </tr>
    <tr>
        <td colspan="3">1</td>
    </tr>
</table>

<form>
    <input type="text" value="初始值">
    <input type="password" placeholder="请输入密码">
    <input type="button" value="按钮">
    <input type="radio" name="a">
    <input type="radio" name="a">
    <input type="checkbox">
    <select>
        <option value="第一项">第一项</option>
        <option value="第二项">第二项</option>
        <option value="第三项">第三项</option>
    </select>
</form>

</body>
</html>